remove hardcoded host value for molecule test openshift_auth (#90)

molecule/default/tasks/openshift_auth.yml

@@ -1,8 +1,13 @@
 ---
-- vars:
-    # TODO(fabianvf) Get this parameter working locally as well
-    openshift_host: 'https://kubernetes.default.svc'
-  block:
+- block:
+    - name: Retrieve cluster info
+      kubernetes.core.k8s_cluster_info:
+      register: k8s_cluster
+
+    - name: set openshift host value
+      set_fact:
+        openshift_host: "{{ k8s_cluster.connection.host }}"
+
     - name: Log in (obtain access token)
       community.okd.openshift_auth:
         username: test